Broken Images in RSS Feed

For about three weeks I used WordPress with PageLines and Feedburner to create a rss feed including thumbnails. But now I'm getting broken images only! In the source code of the original rss feed (http://mobiwatch.de/feed/) I'm seeing a strange image source description like "". I'm no pro but I guess that's the source of the problem, isn't it? But I don't have a clue how this happened! I didn't change anything execpt the PagelInes update yesterday but I'm not sure if the problem didn't occur earlier. The site itself shows all images correctly up to date. And before you ask: I'm using absolute image links like "" Do you have any idea how to fix that? Thanks in advance and kind regards, Lutz

Lutz, PageLines doesn't provide the source of images. That's WordPress and Feedburner, not PageLines.
I've used a plugin called RSS Manager to get thumbnails into the RSS feed. Custom code for RSS feeds is something you need to seek support for from WordPress and the folks at Feedburner.